Fiskars Canada is voluntarily recalling its propane-powered string trimmers due to safety concerns. The SmartPower Propane 4-Cycle Curved Shaft String Trimmer, sold at Canadian Tire stores, could pose a danger when engine vibration allows the propane canister to rotate. This causes abrasion to the fuel line and possible flammability created by gaseous propane being released through the damaged fuel line during both use and storage.

Owners of single-family homes in California must install carbon monoxide monitors by July 1 if they have a fireplace or heater that burns fossil fuels. Homeowners who ignore the new mandate can face fines of up to $200.

The deadline for apartment buildings, hotels and dormitories to comply with the new regulation is not until 2013.

Carbon monoxide, an odorless, colorless gas, is responsible for 30 to 40 deaths in California every year, according to the state’s Air Resources Board. California joins 24 other states in mandating installation of the devices.

Most propane is treated with an ingredient that smells like spoiled eggs when the tank leaks. This safety measure helps consumers detect leaks. But some of the propane in about 700 rail cars of propane gas sold in portable cylinders from Morris Ill.-based Aux Sable Liquid Products do not have sufficient levels of the odorant.

As a result, the U.S. Consumer Product Safety Commission, in cooperation with Aux Sable Liquid Products announced a voluntary recall of the propane cylinders.